hi, can anyone tell me where to find the cmos-backup-battery (CR2032)in an Fujitsu-Siemens 1630. i allready changed the one under the wlan-module - didnīt work (-> F2, enter...). as far i didnt find a pic or description in google or at siemens online-service. thx

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However, most if not all notebooks/motherboards have only one on-board backup 3Volt cell. If you've already changed it with a KNOWN GOOD cell, and it "didn't work" to fix your problem, then the problem likely isn't the cell itself. But then again, it also depends on what the problem is.

- thx for the link - i will try this
- battery is 100% ok
- problem is that the computer doesnīt start without prompting,then you have to press F2 etc...and you have to change time, date etc each time you start the thing
- i suspect where is more then one battery built in as in this german forum one post says:http://www.nickles.de/forum/netbooks-notebooks-und-laptops/201...59022.html
even if its a a1650

Are you basing that on the last post in that link? All the other links referred to only a single cell, and I think that last post's reference to connecting the batteries (plural) was referring to the coin cell AND the main battery.

I think there is still most likely only a single coin-cell "battery" on the motherboard.

However, many years ago some computer manufacturers used a time/date module (a dedicated time-keeping integrated circuit module) on the motherboard that contained its own internal, NON-replaceable battery (good for about 5 years), and they used a separate cell or battery for the CMOS memory. But that was back in the days when some manufacturers also still permanently soldered-in the motherboard CMOS memory cell/battery rather than providing a lithium cell-holder. I suppose the dedicated time/date modules may be still used in some "single-use" electronics packages (e.g. trackers, weather balloon transponders, etc) but that's being supplanted by GPS data.

But, it's hard to believe anyone still uses those on consumer motherboards.